24通道Fm+ I²C总线57 mA/20 V恒定电流LED驱动器 | NXP 半导体

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24通道Fm+ I²C总线57 mA/20 V恒定电流LED驱动器

PCA9956ATW
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PCA9956A是由I²C总线控制的24通道恒流LED驱动器，最适合对娱乐产品的57 mA红色/绿色/蓝色/琥珀色(RGBA) LED进行调光和闪烁控制。每个LEDn输出各自带有8位分辨率(256阶)固定频率的独立PWM控制器，该控制器工作在31.25 kHz下，占空比从0 %至99.6 %可调，允许将LED设为特定的亮度值。额外的8位分辨率(256阶)分组PWM控制器既有122 Hz的固定频率又有15 Hz至每16.8秒一次的可调频率，占空比从0 %至99.6 %可调，用于以相同值对所有LED进行调光或闪烁控制。

每个LED输出可以是关、开(无PWM控制)、按独立PWM控制器的值或按单独和分组PWM控制器的值设置。PCA9956A的工作电源电压范围为3 V至5.5 V，恒定流入电流源LED输出允许最高20 V的LED电源。输出峰值电流可通过8位线性DAC调节，范围为225 µA至57 mA。

此器件具有内置开路、短路负载和过热检测电路。可通过I²C总线读取相应寄存器中的错误信息。此外，热关闭功能会在内部结温超过工艺允许的极限时保护器件。

PCA9956A器件具备快速模式Plus (Fm+) I²C总线接口。Fm+器件提供更高的频率(最高1 MHz)或更密集的总线操作(最高4000 pF)。

低电平有效的输出使能输入引脚(OE)能使所有LED输出闪烁并可用于外部PWM输出，这在需要对多个器件一起进行调光或闪烁控制而不使用软件控制时非常有用。

软件可编程LED分组和三个子寻呼I²C总线地址允许所有或规定分组的PCA9956A器件响应共用I²C总线地址，例如，允许同时打开或关闭所有红色LED或产生选取框追逐效果，从而最大程度减少I²C总线命令。上电时，PCA9956A会具有独特的子寻呼地址以将其识别为24通道LED驱动器。这可允许混合不同通道宽度的器件。PCA9956A有三个硬件地址引脚，允许同一总线上存在最多125个器件。

软件复位(SWRST)功能允许主器件通过I²C总线对PCA9956A进行复位，与上电复位(POR)完全相同，将寄存器初始化为默认状态，使输出电流开关为OFF(LED关)。这能方便且快速地将所有器件寄存器重新配置为相同的条件。

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1 结果

不包含 1 不推荐用于新设计

部件

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计算机辅助设计模型

封装类型

PCA9956ATW
数据手册

替换部件: PCA9956BTW

HTSSOP38

N true 0 PSPPCA9956ATWzh 5 包装信息 Packing Information t935 2 封装信息 Package Information t790 1 手册 Brochure t518 1 数据手册 Data Sheet t520 1 zh zh zh 数据手册 Data Sheet 1 1 2.1 English 1442065895620727372767 PSP 1.2 MB None None documents None 1442065895620727372767 /docs/en/data-sheet/PCA9956A.pdf 1245000 /docs/en/data-sheet/PCA9956A.pdf PCA9956A documents N 2015-09-12 24-channel Fm+ I2C-bus 57 mA/20 V constant current LED driver /docs/en/data-sheet/PCA9956A.pdf /docs/en/data-sheet/PCA9956A.pdf Data Sheet N 980000996212993340 2022-12-07 pdf en Apr 16, 2015 980000996212993340 Data Sheet Y N 24-channel Fm+ I2C-bus 57 mA/20 V constant current LED driver 手册 Brochure 1 2 1.0 English 1442124536742699632315 PSP 2.8 MB None None documents None 1442124536742699632315 /docs/en/brochure/75017588.pdf 2752784 /docs/en/brochure/75017588.pdf 75017588 documents N N 2016-07-11 LED controllers: Voltage-switch drivers, constant-current drivers, and Flash LED drivers /docs/en/brochure/75017588.pdf /docs/en/brochure/75017588.pdf Brochure N 712453003803778552 2024-10-21 pdf N en Jul 2, 2014 712453003803778552 Brochure Y N LED controllers: Voltage-switch drivers, constant-current drivers, and Flash LED drivers 封装信息 Package Information 1 3 1.0 English 1455079405919712392580 PSP 639.2 KB None None documents None 1455079405919712392580 /docs/en/package-information/SOT1331-1.pdf 639185 /docs/en/package-information/SOT1331-1.pdf SOT1331-1 documents N N 2016-02-12 plastic thermal enhanced thin shrink small outline package; 38 leads; body with 4.4 mm; lead pitch 0.5 mm; exposed die pad /docs/en/package-information/SOT1331-1.pdf /docs/en/package-information/SOT1331-1.pdf Package Information N 302435339416912908 2022-12-07 pdf N en Feb 8, 2016 302435339416912908 Package Information Y N plastic thermal enhanced thin shrink small outline package; 38 leads; body with 4.4 mm; lead pitch 0.5 mm; exposed die pad 包装信息 Packing Information 2 4 1.0 English 1442131577749724962638 PSP 435.0 KB None None documents None 1442131577749724962638 /docs/en/packing/SOT1331-1_118.pdf 435000 /docs/en/packing/SOT1331-1_118.pdf SOT1331-1_118 documents N 2015-09-13 HTSSOP38; Reel pack; SMD, 13" Q1/T1 standard product orientation; Orderable part number ending ,118 or J, Ordering code (12NC) ending118 /docs/en/packing/SOT1331-1_118.pdf /docs/en/packing/SOT1331-1_118.pdf Packing Information N 145666923842250347 2022-12-07 pdf en Aug 8, 2014 145666923842250347 Packing Information Y N HTSSOP38; Reel pack; SMD, 13" Q1/T1 standard product orientation; Orderable part number ending ,118 or J, Ordering code (12NC) ending118 5 1.0 English 1442131317139709209231 PSP 445.9 KB None None documents None 1442131317139709209231 /docs/en/packing/SOT1331-1_518.pdf 445865 /docs/en/packing/SOT1331-1_518.pdf SOT1331-1_518 documents N N 2014-08-08 HTSSOP; Reel dry pack, SMD, 13" Q1/T1 standard product orientation Orderable part number ending ,518 or Y Ordering code (12NC) ending 518 /docs/en/packing/SOT1331-1_518.pdf /docs/en/packing/SOT1331-1_518.pdf Packing Information N 145666923842250347 2022-12-07 pdf N en Aug 8, 2014 145666923842250347 Packing Information Y N HTSSOP; Reel dry pack, SMD, 13" Q1/T1 standard product orientation Orderable part number ending ,518 or Y Ordering code (12NC) ending 518 false 0 PCA9956ATW downloads zh-Hans true 1 Y PSP 包装信息 2 /docs/en/packing/SOT1331-1_118.pdf 2015-09-13 1442131577749724962638 PSP 4 Aug 8, 2014 Packing Information None /docs/en/packing/SOT1331-1_118.pdf English documents 435000 None 145666923842250347 2022-12-07 /docs/en/packing/SOT1331-1_118.pdf HTSSOP38; Reel pack; SMD, 13" Q1/T1 standard product orientation; Orderable part number ending ,118 or J, Ordering code (12NC) ending118 /docs/en/packing/SOT1331-1_118.pdf documents 145666923842250347 Packing Information N en None Y pdf 1.0 N HTSSOP38; Reel pack; SMD, 13" Q1/T1 standard product orientation; Orderable part number ending ,118 or J, Ordering code (12NC) ending118 435.0 KB SOT1331-1_118 N 1442131577749724962638 /docs/en/packing/SOT1331-1_518.pdf 2014-08-08 1442131317139709209231 PSP 5 Aug 8, 2014 Packing Information None /docs/en/packing/SOT1331-1_518.pdf English documents 445865 None 145666923842250347 2022-12-07 N /docs/en/packing/SOT1331-1_518.pdf HTSSOP; Reel dry pack, SMD, 13" Q1/T1 standard product orientation Orderable part number ending ,518 or Y Ordering code (12NC) ending 518 /docs/en/packing/SOT1331-1_518.pdf documents 145666923842250347 Packing Information N en None Y pdf 1.0 N N HTSSOP; Reel dry pack, SMD, 13" Q1/T1 standard product orientation Orderable part number ending ,518 or Y Ordering code (12NC) ending 518 445.9 KB SOT1331-1_518 N 1442131317139709209231 封装信息 1 /docs/en/package-information/SOT1331-1.pdf 2016-02-12 1455079405919712392580 PSP 3 Feb 8, 2016 Package Information None /docs/en/package-information/SOT1331-1.pdf English documents 639185 None 302435339416912908 2022-12-07 N /docs/en/package-information/SOT1331-1.pdf plastic thermal enhanced thin shrink small outline package; 38 leads; body with 4.4 mm; lead pitch 0.5 mm; exposed die pad /docs/en/package-information/SOT1331-1.pdf documents 302435339416912908 Package Information N en None Y pdf 1.0 N N plastic thermal enhanced thin shrink small outline package; 38 leads; body with 4.4 mm; lead pitch 0.5 mm; exposed die pad 639.2 KB SOT1331-1 N 1455079405919712392580 手册 1 /docs/en/brochure/75017588.pdf 2016-07-11 1442124536742699632315 PSP 2 Jul 2, 2014 Brochure None /docs/en/brochure/75017588.pdf English documents 2752784 None 712453003803778552 2024-10-21 N /docs/en/brochure/75017588.pdf LED controllers: Voltage-switch drivers, constant-current drivers, and Flash LED drivers /docs/en/brochure/75017588.pdf documents 712453003803778552 Brochure N en None Y pdf 1.0 N N LED controllers: Voltage-switch drivers, constant-current drivers, and Flash LED drivers 2.8 MB 75017588 N 1442124536742699632315 数据手册 1 /docs/en/data-sheet/PCA9956A.pdf 2015-09-12 1442065895620727372767 PSP 1 Apr 16, 2015 Data Sheet None /docs/en/data-sheet/PCA9956A.pdf English documents 1245000 None 980000996212993340 2022-12-07 /docs/en/data-sheet/PCA9956A.pdf 24-channel Fm+ I2C-bus 57 mA/20 V constant current LED driver /docs/en/data-sheet/PCA9956A.pdf documents 980000996212993340 Data Sheet N en None Y pdf 2.1 N 24-channel Fm+ I2C-bus 57 mA/20 V constant current LED driver 1.2 MB PCA9956A N 1442065895620727372767 true Y Products

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